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GENERAL DIAGRAM FOR TWO-STAGE
L.P.G. PRESSURE REDUCTION
FOR BURNER OR BOILER
N° 8721/2/GB
Rev. 21/03/90
OPERATING ANOMALY
1) Check the fuses of the feed line. Check the
fuses of the control box. Check the line of the
thermostats and the gas pressure switch.
2) Check the opening of the detecting devices
located along the feeding pipes.
1) Check the valves operation.
2) Check the operation of the ignition
transformer. Check the position of the electrodes
ends.
3) Check the setting and operation of the air
pressure switch.
1) Check the position of the control electrode.
Check the valve of the ionisation current.
TYPE OF IRREGULARITY
PROBABLE CAUSE
RIMEDY
The burner does not start.
The burner starts but the
flame does not ignite. The
burner stops
consequently.
The burner starts and the
flame ignites then the
burnes stops.
1) Lack of currente.
2) Gas does not reach the burner.
1)The gas valves do not open.
2) There is no spark at the electrode.
3) The air pressure switch does not
give it’s consent to the control box.
1) The control electrode does not
detect or detects the flame
improperly.
